We know this formula for degree of unsaturation-????
C3H6O has 3 C , 6 H , 0 N , 0 X.
So,
It means A ring or a double bond is present.
All possible compounds are:
Metamerism is not possible with 3 carbons.
Positional isomerism is not present.
Functional group isomerism is present. functional groups: alcohol, ether, aldehyde, ketone, alkene, etc.
Therefore, the Correct option is (2)
Study 40% syllabus and score up to 100% marks in JEE